* {
    padding: 0;
    margin: 0;
    list-style: none;
}

.map {
    position: relative;
    width: 800px;
    height: 600px;
    background: #ccc;
    margin: 30px auto;
}

.startOrStop {
    width: 800px;
    height: 50px;
    margin: 0 auto;
    text-align: center;
    line-height: 50px;
}

.startOrStop .start {
    width: 150px;
    height: 50px;
    background: rgb(13, 202, 13);
    border-radius: 20px;
    color: #fff;
    outline: none;
    border: none;
    font-size: 28px;
    font-family: '楷体';
    font-weight: bolder;
    cursor: pointer;
}

.startOrStop .stop {
    width: 150px;
    height: 50px;
    background: rgb(250, 61, 61);
    border-radius: 20px;
    color: #fff;
    outline: none;
    border: none;
    font-size: 28px;
    font-family: '楷体';
    font-weight: bolder;
    margin-left: 20px;
    cursor: pointer;
}